package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @Author 江峰
 * @Date 2024/6/25 21:33
 * @packageName:com.sky.service.impl
 * @ClassName:ReportServiceImpl
 */
@Slf4j
@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额数据统计
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
        //存放begin 到end之间的每天对应的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);//日期计算，获得指定日期后1天的日期
            dateList.add(begin);
        }

        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover=turnover==null?0.0:turnover;
            turnoverList.add(turnover);
        }
        //数据封装
        TurnoverReportVO turnoverReportVO=TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
        return turnoverReportVO;
    }

    /**
     * 用户数据统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);
        while(!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList=new ArrayList<>();//新增用户数
        List<Integer> totalUserList=new ArrayList<>();//总用户数

        for(LocalDate date:dateList){
            LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);

            Map map=new HashMap();
            map.put("end",endTime);
//            select count(id) from user where create_time > ? and create_time < ?

            //总用户数据
            Integer totalUser=orderMapper.countByMap(map);

            map.put("begin",beginTime);

            //新增用户数据
            Integer newUser=orderMapper.countByMap(map);

            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }

        //封装数据
        UserReportVO userReportVO=UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
        return userReportVO;
    }

    /**
     * 订单数据推荐
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        //存放begin到end 之间每天的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //每天订单总数集合
        List<Integer> orderCountList=new ArrayList<>();
        //每天有效订单总数集合
        List<Integer> validOrderCountList=new ArrayList<>();
        for(LocalDate date:dateList){
            LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);

            //查询每天的总订单数
            Integer orderCount=getOrderCount(beginTime,endTime,null);

            //查询每天的有效订单数
            Integer validOrder=getOrderCount(beginTime,endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrder);
        }

        //时间区间内的总订单数
        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();
        //时间区间内的总有效订单数
        Integer validOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate=0.0;
        if(totalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据时间区间统计指定状态的订单数量
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime,LocalDateTime endTime,Integer status){
        Map map=new HashMap();
        map.put("begin",beginTime);
        map.put("end",endTime);
        map.put("status",status);
        return orderMapper.ordersCountByMap(map);
    }

    /**
     * 销量排名统计
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10=orderMapper.getSalesTop10(beginTime,endTime);

        List<String> names=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers=salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList=StringUtils.join(numbers,",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出近30天的运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin=LocalDate.now().minusDays(30);
        LocalDate end=LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData=
                workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN)
                                                , LocalDateTime.of(end,LocalTime.MAX));
        InputStream in=this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel=new XSSFWorkbook(in);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue("时间："+begin+"至"+end);

            //获得第4行
            XSSFRow row = sheet.getRow(3);

            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN),
                        LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
//            out.flush();
            out.close();
            excel.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
